Grain-screen



2 Sheets-Sheet 1.

(No Model.)

J. 1). BELTON.

GRAIN SGREBN.

Patented June 12,1883;

FIG.1.

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(No Model.)

2 Sheets-Sheet 2-. J. D. BELTON.

GRAIN'SGREEN.

PatentedJunelZ, 1883.

FIRE.

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UNITED STATES PATENT OFFICE.

JOHN D. BELTON, OF NEW ORLEANS, LOUISIANA.

GRAiN-SCREEN.

SPECIFICATION forming partof Letters Patent No. 279,215, dated June 12, 1883.

Application filed October 31,1882. (N0 model.)

To all whom .it may concern:

- Be it known that 1, JOHN DIXON BELTON, a resident of the city of New Orleans, parish of Orleans, and State of Louisiana, have invented a certain new and useful Improvement in Grain-Screens; and I do hereby declare the following to be a full, clear, and correct description of the same, reference beinghad to the annexed drawings, making a part of this specification.

My invention relates to certain improvements in machines for screening grain; and it consists in the construction and arrangement of parts, as will be more fully set forth, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a side elevation of my improved screen. Fig. 2 is a longitudinal section of the same, and Fig. 3 a plan or top view thereof. Fig. 4 is a perspective View of the screen-frame, and Fig. 5 a similar view of a detachable sieve or screen.

The frame is rectangular in form, and consists of four uprights, A, having connecting end pieces, B, and side pieces, 0. From the latter is suspended, by pivoted rods or links (I, the screen-frame E, the sides of which are recessed, as at e e, to receive a detachable sieve or screen, F, which is made to fit in the aforesaid recesses.

The screen is made detachable and provided with a sheet-metal bottom, f, having perforations therein to suit the different kinds of grain for which it is to be used. The smaller the grain the smaller the perforations.

To prevent sagging, the bottoms of the screens are provided with battens f, which also serve to hold the screens securely in the frame, as will be seen by referring to Fig. 2.

Within the frame E is secured an inclined bottom, 9, upon which the screened grain falls, and along which it moves to the dischargeopening G at the lower end thereof.

The forward end of the screen is covered to a certain extent with a smooth metal plate, h, so as to deflect the current of air created by the fan, and to cause the same to undulate through the grain.

Motion is imparted to the shaker by an cecentric or cam, K, which is secured on the main shaft '6, the latter having its bearings in the uprights A, at one end of the frame, and the eccentric operating in a rectangular opening, L, formed in the forward end of the shaker, as shown. I

To the upper edges of the side pieces, 0, are secured covered journal-boxes Z, forming bearings for a shaft, 1), on which is hinged, as at w, the casing U of a revolving fan. The shaft 1, 011 which the fan is secured, operates in bearings that are formed outside of the central openings of the casing, as shown at o. One end of this shaft is provided with a pulley, 8, having a belt-connection, 'r, with a pulley, q, that is keyed or otherwise secured-on the shaft p. 011 the latter shaft is another pulley, 0, through which it receives motion from the main shaft 1', through a pulley, I, and belt or, the power being applied to the latter shaft, 5, through the pulley 00, (see Fig. 3,)by any-de sirable means.

The top of the shaker-frame is provided at one end with inclined bcaringsy, on which opcrate friction-rollers .2, that are journaled in the lower ends of lugs e on the under side of the fan-casing U, forming a support for the outer end of the said casing, which is thereby alternately raised and lowered as the frame is moved forward and'backward, and by which action the air-currents sweep more effectually over the screen and its contents.

To relieve the screen of the weight of the fan when the latter has settled down to the lowest point desirable, the upper edges of the side pieces, 0, are provided with half-boxes a, so placed as to receive the shaft 1, as shown in Figs. 1 and 3.

From the manner in which the fan and its casing are suspended it will be seen that the same can be readily swung up out of the way, without removing the belts thereof, whenever it is requisite to clean the screen or ,to substi tutc another.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In grain-screening machines, the combination of the pivoted or hinged fan-casing U and the screen-frame E, adapted to support g, substantially as and operate the said casin described, and for the purpose set forth.

2. The combination, in grain-screening machines, of the fan-casing U, having end bearings, o, the shaft the revolving fan, shaft 2, adapted to operate in said bearings 12, the pul leys s and q, and the connecting-belt 9, substantially as described, and for the purpose specified.

3. I11 combination with the frame A, links (Z, and screen-frame E, provided with inclined bearings 3 the casing U, provided with fanshaft bearings 11, lugs z, and friction-rollers z,

and the shaft 1), said casing being connected IO with and adapted to. operate 011 said shaft, sub stantially as and for the purpose set forth.

In testimony whereof I hereunto sign my name.

JOHN DIXON BELTON: In presence of- J. N. MU LER, P. J. FINNEY. 

